Ideal for complete aquarium cleaning or quick maintenance. Easily removes residue from the substrate without disturbing the lower layer of gravel. Please pay attention to the usage instructions on the video and detail page. Improper use can cause blockage. The automatic pump removes water and fills the aquarium with water. Adjust the height to suit your needs. This eco-friendly product supports aquatic life with a 'green' approach. This unit can be used in freshwater and saltwater aquariums with a water depth of up to approximately 70 cm. Product: Aquarium vacuum cleaner. Ideal for fast and efficient cleaning, it reduces and simplifies maintenance time. It effectively removes debris and other harmful particles without disturbing the lower gravel layer. Helps maintain your aquarium and aquatic life, improves filter performance, and keeps fish and plants healthy. Functions as both a vacuum cleaner and a water change system. Removes waste and harmful particles. Does not disturb the gravel layer. Designed for medium and large aquariums over 40 cm in height. The extension nozzle can be used for deeper aquariums. Tilt to better clean gravel, change water, and remove waste. Allows cleaning without mess. Always keep the pump completely submerged; otherwise, it will stop working. Remove the filter element. Remove the end caps from both ends of the filter element. Rinse accumulated impurities thoroughly under running water. The vacuum cleaner is suitable for freshwater and saltwater aquariums with a water depth up to approximately 71 cm. The grain size of the aquarium gravel should be no less than 2 mm. Not suitable for cleaning sandy substrates. Depending on aquarium depth, use the extension tube or extension nozzle. Position the pump below the minimum waterline before starting. If the pump impeller becomes blocked, loosen the impeller nut counterclockwise, remove the cover, and clean debris from inside. It is recommended to change up to 25% of the total aquarium water every 2 to 4 weeks.